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在错综复杂的化学变化中 ,抓住反应前后某些量保持不变 ,即“守恒”作为解题依据 ,可以简化计算步骤 ,提高解题速度和准确度。与铁及其化合物有关的众多计算题中 ,能运用守恒原理巧妙解答的题型特别多 ,只要解题时运用得当 ,可事半功倍。其常见题型及守恒关系可归纳如下 :一、
In the intricate chemical changes, certain quantities remain unchanged before and after seizing the reaction, that is, “conservation” as the solution basis, which can simplify the calculation steps and increase the speed and accuracy of problem solving. Among the many computational problems related to iron and its compounds, the types of questions that can be solved with the conservation principle are ingenious, as long as they are applied properly when solving problems, they can do more with less. The common questions and conservation relations can be summarized as follows: